Adds backport change for `pipeline.scss` updates
What does this MR do?
This is the CE backport for the changes made in gitlab-ee!11633. It is an update of !27698 (closed), which was closed when the branch was renamed.
Does this MR meet the acceptance criteria?
Conformity
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Changelog entry -
Documentation created/updated or follow-up review issue created -
Code review guidelines -
Merge request performance guidelines -
Style guides -
Database guides -
Separation of EE specific content